Bristol-Myers Posts Lower Profit  NEW YORK (Reuters) - Bristol-Myers Squibb Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BMY.N target=/stocks/quickinfo/fullquote"&gt;BMY.N&lt;/A&gt; on  Friday reported a lower third-quarter profit as U.S. sales fell  amid competition from rival brands and cheaper generics and the  company took a number of special charges. 
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